feat: Adds some documentation strings in ManualDCore module.

Sources/ManualDClient/Helpers.swift

@@ -46,10 +46,6 @@ extension TrunkSize {
   }
 }
 
-extension ComponentPressureLosses {
-  var totalLosses: Double { values.reduce(0) { $0 + $1 } }
-}
-
 extension Array where Element == EffectiveLengthGroup {
   var totalEffectiveLength: Int {
     reduce(0) { $0 + $1.effectiveLength }